Via AWS Security Bulletin https://github.com/aws/aws-lc
----- Forwarded message from "Latest Bulletins: Amazon Web Services" <[email protected]> ----- > Date: Tue, 03 Mar 2026 09:30:01 -0000 > From: "Latest Bulletins: Amazon Web Services" <[email protected]> > To: [email protected] > Subject: Issue with AWS-LC: an open-source, general-purpose cryptographic > library (CVE-2026-3336, CVE-2026-3337, CVE-2026-3338) > > **Bulletin ID:** 2026-005-AWS > **Scope:** AWS > **Content Type:** Important (requires attention) > **Publication Date:** 2026/03/02 14:30 PM PST > > **Description:** > > AWS-LC is an open-source, general-purpose cryptographic library. We identified > three distinct issues: > > \- CVE-2026-3336: PKCS7_verify Certificate Chain Validation Bypass in AWS-LC > Improper certificate validation in PKCS7_verify() in AWS-LC allows an > unauthenticated user to bypass certificate chain verification when processing > PKCS7 objects with multiple signers, except the final signer. > \- CVE-2026-3337: Timing Side-Channel in AES-CCM Tag Verification in AWS-LC > Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an > unauthenticated user to potentially determine authentication tag validity via > timing analysis. > \- CVE-2026-3338: PKCS7_verify Signature Validation bypass in AWS-LC > Improper signature validation in PKCS7_verify() in AWS-LC allows an > unauthenticated user to bypass signature verification when processing PKCS7 > objects with Authenticated Attributes. > > **Impacted versions:** > > \- PKCS7_verify Certificate Chain Validation Bypass in AWS-LC >= v1.41.0, < > v1.69.0 > \- PKCS7_verify Certificate Chain Validation Bypass in aws-lc-sys >= v0.24.0, > < v0.38.0 > \- Timing Side-Channel in AES-CCM Tag Verification in AWS-LC >= v1.21.0, < > v1.69.0 > \- Timing Side-Channel in AES-CCM Tag Verification in AWS-LC >= AWS-LC- > FIPS-3.0.0, < AWS-LC-FIPS-3.2.0 > \- Timing Side-Channel in AES-CCM Tag Verification in aws-lc-sys >= v0.14.0, < > v0.38.0 > \- Timing Side-Channel in AES-CCM Tag Verification in aws-lc-sys-fips >= > v0.13.0, < v0.13.12 > \- PKCS7_verify Signature Validation bypass in AWS-LC >= v1.41.0, < v1.69.0 > \- PKCS7_verify Signature Validation bypass in aws-lc-sys >= v0.24.0, < > v0.38.0 > > **Please refer to the article below for the most up-to-date and complete > information related to this AWS Security Bulletin.** > > > > URL: https://aws.amazon.com/security/security-bulletins/rss/2026-005-aws/ ----- End forwarded message -----
